int switch_eg(int x, int n) {
    int result = x;
    switch (n) {
        case 100:
            result += 13;
            break;
        case 102:
            result += 10;
            // no break;
        case 103:
            result += 11;
            break;
        case 104:
        case 106:
            result *= result;
            break;
        default:
            result = 0;
    }
    return result;
}